Bottle cap



FIG. 1 is a top perspective view of a bottle cap in accordance with my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a is a front elevational view thereof, a rear elevational view thereof being identical;

FIG. 4 is a is a right side elevational view thereof, a left side elevational view thereof being identical; and,

FIG. 5 is a bottom view thereof.

The broken lines in the figures showing the bottom/interior of the bottle cap depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for a bottle cap, as shown and described. 